Re: Yamaha Outboard Runaway Tilt Up
Basically what usually happens is that water leaks into the switch creating corrosion which grows until there is enough to bridge the gap between the contacts. It usually happens to the UP circuit because that contact is at the bottom of the toggle switch, and where the water will stand. Ray's right, it's usually a boat switch, not a Yamaha switch. But it could be those as well. There is one on the throttle handle and one on the motor. Disconnect each in turn to see which is the culprit. Wire colors you are looking for are red for power, green for down, blue for up. If it's a Yamaha switch at fault, my bet would be the one on the motor. It's not only exposed to rain water, but sea spray as well.<br /><br />Most trim switches have power all the time. This really accelerates the corrosion process by a bunch. The corrosion builds until it trips the relay. The only damage is usually a dead battery. If you happen to have a battery switch, turn it off when you're not using the boat. If not, don't worry too much about it.
